This report describes long-term trends in 9-, 13- and 17-year-olds' achievement in reading and mathematics during the last three decades. In 2004, a representative sample of more than 11,000 students in public and private schools at each of the three ages participated in the long-term trend assessment in each subject area. These findings provide a look at the performance of America's students over a period of 33 years, beginning in 1971 for reading and 1973 for mathematics. The report summarizes trends in average scale scores for all students and for groups of students defined by gender and race/ethnicity. One additional variable for each age is also presented. For age 9, scores are broken out by percentiles; for age 13, scores are shown for students whose parents attained various levels of education; and for age 17, course-taking patterns are highlighted. These different presentations are meant to provide a snapshot of the data available in the full report.

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